(57) An ultrasonic blood flow imaging forming apparatus is described in which ultrasonic
beams are transmitted into and reflected by a living body to color-display the distribution
of velocity in a moving member and the properties of the living body's tissue on a
CRT screen in the two-dimensional manner.
The ultrasonic blood flow imaging apparatus includes a color processing section (26)
for forming an image in accordance with vector signals, the color processing section
including a color processor responsive to vector angles in the vector signals to change
the hue (ROMs 42, 44, 46), and a brightness processor (54) responsive to amplitudes
of the vector signals to change the brightness of the hue. The apparatus also includes
a complementary color mixing processor (62) responsive to the third data of the living
body obtained from the ultrasonic received signals to mix the hue which is outputted
from the color processor with its complementary color.
For example, when the motion of the moving reflective member is displayed, the directions
of the moving reflective member are indicated with different hues corresponding to
vector angles in the vector signals while the velocities of the moving reflective
member are represented with different brightnesses corresponding to amplitudes of
the vector signals. Furthermore, the third data including velocity deviations and
others are displayed with a color saturation obtained by mixing the hue determined
by the corresponding vector angle with its complementary color.
Therefore, various states of the moving reflective member, that is, the velocity,
brightness and direction can easily be observed with changes in the hue. Furthermore,
the variance of the velocity represented by the velocity deviations can be observed
with changes of the color saturation.
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